bug#39089: Guix System: Very long, scary boot time

[sirgazil via Bug reports for GNU Guix]

I forgot to say I'm using this Guix:

$ LANG=C guix describe
Generation 7    Jan 08 2020 13:53:10    (current)
  guix f98c050
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: f98c050c2017be06cff54abf965a8234f6998f76